简介：Twopotexperimentswithacompletelyrandomdesignand4replicationswereperformedinagreenhousetoexaminetheresponsedifferenceof17cultivarsofpakchoi(BrassicachinensisL.)growninaCu-spikedandacleansoiltoCu.relativelytolerant.Whenthe17cultivarsofpakchoigrewincleangardensoil,theCuconcentrationsintheabovegroundpartwerepositivelycorrelated(r=0.6693)withtheirrootCuconcentrations.However,whentheygrewintheCu-spikedsoilahighlynegativecorrelationcoefficient(r=-0.5376)wasobtainedintheCuconcentrationbetweentheabovegroundpartandtheroot.ThismeantthattheCutolerantcultivarshadaweakabilitytotransferCufromtheirroottotheirabovegroundpart,andthereforestoredmuchmoreCuintheirrootthantheCusensitivecultivars.

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简介：研究证明了许多化学成分由哌啶碱统治了，flavonoids例如lobelanidine，洛贝林，和lobelanine，从山梗莱属的植物chinensis愁相被获得了。试验性的研究和临床的应用也显示了那L。chinensis拥有很多项药理学活动(例如，利尿剂，choleretic，呼吸兴奋，反毒液，抗菌剂，和anticancer)。这篇论文集中于L的性质，化学成分，和anticancer活动。chinensis将在他们之中澄清连接，并且识别活跃anticancer混合物。这个工作为L的进一步的研究和开发用作基础。chinensis。

简介：H3,ahomogeneousacidicpolysaccharidewasobtainedfromtheseedsofCuscutachinensisLam.Itsstructurewascharacterizedforthefirsttimebychemicalandspectroscopicmethodstobeahighlybranchedheteropolysaccharidewithmeanmolecularweightofmorethanlxl0^6.Itwascomposedof1,6-1inked-β-DGalp,1,4-linked-β-DGalp,1,4-1inked-β-DGalA,1,3,6-1inked-β-DGalpand1,2,4-1inkedRhap,withbranchingpointsatO-2or0-4of1,2,4-1inkedRhapand0-3of1,3,6-1inked-β-DGalp.Itssidechainsincluded1-1inkedAraf,1,5-1inkedArafand1,3,5-1inkedArafatO-3of1,6-1inkedGalpinthemainchain.

简介：Inordertostudytheeffectofanti-HABsagentsonPenaeuschinensis,thetoxicityexperimentsonclay,Ca(ClO)2,FeCl3,andAlCl3toPenaeuschinensisarecarriedout.Theresultsshowthat:(1)theclayisn'ttoxictoPenaeuschinensis;(2)Ca(ClO)2hasnotoxicitytoPenaeuschinensisatlowlevels,buthasacuteandchronictoxicityathighlevels;(3)PenaeuschinensiscanaccumulateFeandAl.Thetoxiceffectneedsfurtherstudy.

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简介：摘要：在现代化工业控制系统中，跟踪控制系统已经成为必不可少的组成部分：一方面它便于操作人员随时掌握全线物料的分布情况；另一方面，越来越多的生产控制功能都依赖于跟踪系统。在热连轧生产线中，由于生产线长、生产节奏快，一旦跟踪系统出错，将直接影响生产，甚至造成生产事故。

简介：摘要：在现代化工业控制系统中，跟踪控制系统已经成为必不可少的组成部分：一方面它便于操作人员随时掌握全线物料的分布情况；另一方面，越来越多的生产控制功能都依赖于跟踪系统。在热连轧生产线中，由于生产线长、生产节奏快，一旦跟踪系统出错，将直接影响生产，甚至造成生产事故。

简介：ExperimentswereconductedtoexaminetheeffectsofsalinityfluctuationontheintermoltperiodandgrowthofFenneropenaeuschinensiswithaninitialbodyweightof(0.5532±0.0001)g(meanplusorminusSE).Thesalinity(S0)ofthecontroltreatmentis30throughouttheexperiment,whilethetreatmentsS2,S4,S7andS10aresubjectedtodifferentsalinityfluctuations,andtherangesare2,4,7and10,respectively.Aftera30-dayfeedingtrial,thelongestandtheshortestintermoltperiodsoftheshrimpoccurunderTreatmentsS10andS2,respectively(difference37.14%).Thespecialgrowthrates(SGR)oftheshrimpunderthefivetreatmentsarerankedasS7＞S4＞S2＞S10＞S0,andtheSGRoftheshrimpunderTreatmentS0islowerthanthatunderTreatmentsS4andS7by22.36%and28.11%,respectively(P＜0.05).Theminimalfeedintake(FI)oftheexperimentalanimalsoccursinTreatmentS0(84.04%and88.54%ofthatunderTreatmentsS4andS7,respectively)(P＜0.05).Therearenosignificantdifferencesinthefoodconversionefficiency(FCE)oftheshrimpunderthefivetreatments(P＞0.05).

简介：TherearetypicalecosystemsoflittoralwetlandsintheYellowRiverDelta.InordertostudytherelationshipsbetweenTamarixchinensisandenvironmentalvariablesandtopredictT.chinensispotentialdistributionintheYellowRiverDelta,641vegetationsamplesand964soilsampleswerecollectedintheareainOctoberof2004,2005,2006and2007.Thecontentsofsoilorganicmatter,totalphosphorus,salt,andsolublepotassiumweredetermined.Then,theanalyzeddatawereinterpolatedintospatialrasterdatabyKriginginterpolationmethod.Meanwhile,thedigitalelevationmodel,soiltypemapandlandformunitmapoftheYellowRiverDeltawerealsocollected.GeneralizedAdditiveModels(GAMs)wereemployedtobuildspecies-environmentmodelandthensimulatethepotentialdistributionofT.chinensis.TheresultsindicatedthatthedistributionofT.chinensiswasmainlylimitedbysoilsaltcontent,totalsoilphosphoruscontent,solublepotassiumcontent,soiltype,landformunit,andelevation.ThedistributionprobabilityofT.chinensiswasproducedwithalookuptablegeneratedbyGraspModule(basedonGAMs)insoftwareArcViewGIS3.2.TheAUC(AreaUnderCurve)valueofvalidationandcross-validationofROC(ReceiveOperatingCharacteristic)werebothhigherthan0.8,whichsuggestedthattheestablishedmodelhadahighprecisionforpredictingspeciesdistribution.

简介：Inthisstudy,familiesofselectedpopulationforgrowth(SP_BWT),selectedpopulationforwhitespotsyndromevirus(WSSV)resistance(SP_RW),Bohaiwildpopulation(WP_BH)andHuanghaiwildpopulation(WP_HH)ofF.chinensiswereconstructedthroughartificialinseminationandwiththestandardizedprocedureoflarvaerearing.Growthandsurvivalperformancewerestudiedamongfourpopulationsaftera70dayscommontest.Theresultsshowedthatthemaximumleastsquaremeanofbodyweightwas17.50ginSP_BWTwhiletheminimumwas13.03ginWP_HH.ComparedwithWP_BH,bodyweightofSP_BWTincreasedby23.41%(P<0.01)andthatofSP_RWby12.20%(P>0.05).BodyweightsofSP_BWTandSP_RWweresignificantlyhigherthanthatofWP_HH,whichincreasedby34.31%(P<0.01)and22.10%(P<0.05),respectively.ThemeanAGRoffourpopulationswas0.19,0.18,0.17and0.16gd-1,respectively.Coefficientofvariationofbodyweightamongfourpopulationswashigh,whichrangedfrom32.67%to35.25%.Sucharangeshowedthattherewasthepotentialityforfurtherimprovementinselectedpopulations.Coefficientofvariationofsurvivalrateamongfourpopulationswaslow,varyingbetween3.20%and5.90%.Thedifferenceofsurvivalwashighlysignificant(P<0.01)betweenSP_BWTandWP_BH,andsignificant(P<0.05)betweenSP_RWandWP_BH.However,nosignificantdifferenceamongotherpopulations(P>0.05)wasobserved.Differentgrowthperformanceswerealsoobservedamongdifferentfamiliesineachpopulation.Thebodyweightof798Ffamilywasthehighest.Theabsolutegrowthrate(AGR)was0.25gd-1,150%higherthanthatofthelowestone,0.1gd-1in807Ffamily.Survivalrateoffamiliesamongfourpopulationswasdifferent.Thehighestwas94.74%,andthelowestwas71.88%.

简介：完全的mitochondrial细胞色素氧化酶子单元II(COII)基因ofPenaeinae虾Fenneropenaeuschinensis被克隆并且定序。基因为229氨酸是在长度和代码的688bp。它显示出83.2%，87.0%和83.8%顺序类似到Marsupenaeusjaponicus，Penaeus单音穿上并且Farfantepenaeusnotialis分别地。在鳕鱼ons的第三个位置的整个基因和那的A+T内容分别地是64.7%和78.2%。在F之间的种系发生的关系。chinensis和代表类Farfanatepenaeus，Marsupenaeus和Penaeus的三另外的种被分析。结果证明在四taxaranged从之中的基因距离0.1440～0.2005，超过与COI和部分16SrRNA基因估计的那些在Marsupenaeus，Litopenaeus和Melicertus之中定序，并且因此比在潜水艇类之中的价值大。COII基因比COI基因和部分16SrRNA基因的有更快的进化的率，这被建议了并且能在类或种水平被用于种系发生的分析。现在的学习的结果显示Farfantepenaeus，Fenneropenaeus，Marsupenaeus和Penaeus比亚属在更高种系发生的水平，它支持四个潜水艇类的种系发生的地位的举起的意见到类水平。

简介：Whitespotsyndromevirus(WSSV)-resistantmolecularmarkerswerescreenedfromtheselectivelybrednewvariety‘HuanghaiNo.2’ofFenneropenaeuschinensisusingunlabeled-probehigh-resolutionmelting(HRM)technique.AftertheartificialinfectionwithWSSV,thefirst96deadshrimpsandthelast96survivingshrimpswerecollected,representingWSSV-susceptibleand-resistantpopulations,respectively.Thegenotypesatwell-developed39singlenucleotidepolymorphisms(SNPs)lociwereobtained.AsrevealedintheChi-squaretest,3SNPs,genotypeA/AofcontigC364-89AT,genotypeA/AofC2635-527CAandgenotypeC/TofcontigC12355-592CT,werepositivelycorrelatedwithdisease-resistancetraits.Other2SNPs,genotypeG/GofcontigC283-145AGandgenotypeC/CofcontigC12355-592CT,werenegativelycorrelated.Moreover,analysiswithBlastXprogramfordisease-resistantSNPsindicatedthat3contigs,Contig283,Contig364andContig12355,matchedtothefunctionalgenesofeffectorcaspaseofPenaeusmonodon,peptidetransporterfamily1-likeprotein,and40SribosomalproteinS2ofPercaflavescenswithhighsequencesimilarity.Theresultswillbehelpfultoprovidetheoreticalandtechnicalsupportsformolecularmarker-assistedselectivebreedingofF.chinensis.

简介：通过从中国虾(Fenneropenaeuschinensis)的随机的染色体序列探索微卫星教材，一些微卫星教材与富有的多态的遗传信息被获得，并且三重的PCR用三份教材(RS1101，RS0683和H081教材)被建立。由调整Mg~(2+)的最后的集中，dNTP和教材，并且用一个触摸镇PCR程序，PCR系统的最佳扩大参数被获得，它能成功地在PCR反应放大三份教材。在使中毒的页胶化，三教材RS1101，RS0683和H081的放大DNA碎片能是容易识别了对方。为三重的PCR系统，PPE(渊源排除的可能性)是0。9679，并且DP(辨别力量)是0。999327。用到出身和他们的父母的测试十个人的三重的PCR，一个个人threemicrosatelliteloci在所有从出身被排除，它可能为象虚假失误那样的一些未知理智被混合进出身。三重的PCR将具有在识别F的出身的大实际价值。chinensis。

简介：摘要我们在蚂蚱Oxyachinensis的二张人口评估杀虫剂的一种的比较毒性，从山西省的Daixian和Fanshi镇定，中国。从二张人口的一般esterases和acetylcholinesterase(疼痛)被描绘并且比较。Daixian人口(7.58g/g身体重量)的LD50比Fanshi人口(3.75g/g身体重量)的高是2.02褶层。在Daixian人口的一般esterase特定的活动是1.91，1.10并且在Fanshi人口的比那些高的1.85褶层当-NA,-NB和-NA分别地被用作底层时。一般esterase的运动研究证明Vmax一般esteraseshydrolyzing-NA,-NB珍视，分别地，在Daixian人口的-NA比在Fanshi人口的那些高是2.15-，1.12-，和1.47褶层。Fanshi人口的疼痛活动比Daixian人口的高是1.54褶层。疼痛的运动分析证明重要差别在Km价值在二张人口之间被介绍；并且在Fanshi人口的Vmax价值在Daixian人口比那高。疼痛的抑制研究显示分别地，从Daixian人口的那疼痛从Fanshi人口比那是2.56-，2.80-，和对由paraoxon，chlorpyrifos-oxon，和demeton-S-methyl的抑制敏感的2.29褶层更少。一般esterases和疼痛的这些生物化学的描述与在二张人口的杀虫剂的一种生物鉴定一致。改变的疼痛和增加的一般esterase活动的减少的敏感处于对在二张人口之间的杀虫剂的一种的Oxyachinensis的无感觉的差别起一个重要作用，这被推断。

简介：Studieshavebeencarriedoutontheeffectoflanthanum-aminoacidcomplexesonembryodevelopmentandnaupliusgrowthofPenaeuschinensis.Theexperimentalresultsindicatethat:(1)Theoptimumconcentrationsoflanthanum-prolineandLanthanumphenylalanineforthedevelopmentofeggsinmonocellanddicellstagesare1.50～4.00mg/Land0.50～3.00mg/L,respectively,theegghatchingratesbeingraisedby21.0～46.0%and23.0～42.8%(P＜0.05)respectively.(2)Theoptimumconcentrationsoflanthanum-prolinecomplexandLanthanum-phenylalaninecomplexforthegrowthofnaupliiare1.50～4.00mg/Land0.50～3.00mg/L,themetamorphosisratefromnaupliustoprotozoeabeingraisedby16.4～27.5%and20.4～26.7%(P＜0.05)respectively.(3)Thepositiveeffectoflanthanum-aminoacidcomplexesonegghatchingandnaupliusmetamorphosisofPenaeuschinensisisbetterthanthatoflanthanum.Withregardtothepositiveeffect,lanthanum-prolinecomplexisbetterthanLanthanum-phenylalaninecomplex.

简介：<正>现代车用变速器使用各种摩擦学形式的摩擦系统,为了能够最好的满足特定的操作条件,除了在离合器和制动单元使用多片式摩擦系统之外,锥形摩擦离合器(同步器)也被应用于变速系统中,其结构符合相互作用的物理力学原理。实际应用涉及到的摩擦元件必须满足特定的功能,以最优的方式与合适的媒介物相结合,使得同步

简介：摘要： 本论文通过2250热轧SSP定宽机轧制板坯时，无法正常抛钢原因进行分析与研究，采取相应的对策以及对SSP定宽机控制程序进行思考，以更加充分的消化新技术、更好的维护设备，确保SSP设备稳定运行，在2250热轧产品质量控制、品种拓展中发挥应有的作用。

简介：[i][l][l]这三个音素到底应归为几个音位，学术界尚无定论。传统的划分音位的“互补原则”、“语音相似原则”和“历史原则”本身存在着局限性，无法有效地处理[i][l][l]的音位归纳问题。运用实用原则和实际原则可以很好地解决这个问题。根据实用原则和实际原则．应将[i][l][l]归为三个音位。